Results 21 to 30 of about 34,813 (125)

Metallic temperature dependence of resistivity in perchlorate doped polyacetylene [PDF]

open access: yesSynthetic Metals 96 (1998) 81, 1998
We have measured the electrical resistivity ($\rho$) and the thermoelectric power (TEP) of the perchlorate (ClO4^-) doped stretch oriented polyacetylene (PA) film. For the highly conducting samples ($\sigma_{RT} > 41000 S/cm$), the temperature dependence of the 4-probe resistivity shows positive temperature coefficient of resistivity (TCR) from T=1.5K ...
arxiv  

Electron Photodetachment from Aqueous Anions. II. Ionic Strength Effect on Geminate Recombination Dynamics and Quantum Yield for Hydrated Electron [PDF]

open access: yes, 2004
In concentrated solutions of NaClO4 and Na2SO4, the quantum yield for free electron generated by detachment from photoexcited anions (such as I-, OH-, ClO^4-, and [SO3]^2-) linearly decreases by 6-12% per 1 M ionic strength. In 9 M sodium perchlorate solution, this quantum yield decreases by roughly an order of magnitude.
arxiv   +1 more source

Tuning of the magnetic properties of the high spin molecular cluster Fe8 [PDF]

open access: yesarXiv, 2001
The synthesis, crystal structure and magnetic characterization of a high spin cluster comprising eight iron ions, are presented in this contribution. The cluster has formula [(tacn)6Fe8O2(OH)12Br4.3(ClO4)3.7]6H2O, (Fe8PCL) where tacn is the organic ligand 1,4,7-triazacyclononane.
arxiv  

Ultrafast Pulse Radiolysis Using a Terawatt Laser Wakefield Accelerator [PDF]

open access: yes, 2006
We report the first ultrafast pulse radiolysis transient absorption spectroscopy measurements from the Terawatt Ultrafast High Field Facility (TUHFF) at Argonne National Laboratory. TUHFF houses a 20 TW Ti:sapphire laser system that generates 2.5 nC sub-picosecond pulses of multi-MeV electrons at 10 Hz using laser wakefield acceleration. The system has
arxiv   +1 more source

Methane and oxygen from energy-efficient, low temperature in situ resource utilization enables missions to Mars [PDF]

open access: yesAIChE Journal 69 (5), e18010 (2023)
NASA mandate is a human mission to Mars in the 2030s and sustained exploration of Mars requires in-situ resource utilization (ISRU). Exploiting the Martian water cycle (alongside perchlorate salts that depress the freezing point of water to less than 213K) and the available 95 volume percent atmospheric CO2, we detail an ultra-low temperature (255K ...
arxiv   +1 more source

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